Wristwatch



FIG. 1 is a top, front and right side perspective view of a wristwatch embodying my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a right-side elevational view thereof; and,

FIG. 6 is a left-side elevational view thereof. 

The ornamental design for a wristwatch, as shown. 